Busy loop when pausing MP3 recording

[madadam]

Checklist

• I can reproduce the bug with the latest version given here.
• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one bug.
• I have read and understood the contribution guidelines.

Affected app version

1.7.0

Affected Android/Custom ROM version

any

Affected device model

any

How did you install the app?

Built from source

Steps to reproduce the bug

1. Select MP3 as the recording format
2. Start recording
3. Pause recording

Expected behavior

When recording is paused, the recording thread should get blocked waiting on e.g. a condition variable or some other suitable synchronization object.

Actual behavior

The recording thread busy loops while checking the isPaused variable. This can cause unnecessary battery drain.

Screenshots/Screen recordings

No response

Additional information

This is where the busy loop is: https://github.com/FossifyOrg/Voice-Recorder/blob/main/app/src/main/kotlin/org/fossify/voicerecorder/recorder/Mp3Recorder.kt#L82.